Dirt Trail over Rock Ck
PoorClosed to trafficMiner County, South Dakota · 10S & 11.5W Howard · Structure no. 000000049045230
- Built
- 1910
- 115 years old
- Condition
- Poor
- inspected July 2008
- Type
- Truss - Thru
- Steel
- Length
- 51 ft
- 1 main span
- Daily traffic
- 5
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Dirt Trail over Rock Ck is a steel truss - thru carrying Dirt Trail over Rock Ck in Miner County, South Dakota. It was built in 1910, so it is 115 years old, older than the South Dakota average of 48.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 5 vehicles a day, roughly 2% of them trucks, projected to reach 5 by 2032. The structure is 51 ft (15.5 m) long and 17 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Dirt Trail over Rock Ck built?
It was built in 1910, making it 115 years old in 2025.
What condition is Dirt Trail over Rock Ck in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2008.
How much traffic does Dirt Trail over Rock Ck carry?
About 5 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Dirt Trail over Rock Ck?
The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 17 ft wide.
Who owns Dirt Trail over Rock Ck?
It is owned by the County Highway Agency.